Well elevator



Aug. 5 1924. 1,503,789

J. GRANT WELL @LEVATOR Original Filed: April 13, 1922 umlll I JVENTOR, M

atent Aug. 5, 1924.

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FEE.

JOHN GRANT, OF LOS ANGELES, CALIFORNIA, ASSIGNOR T DUNN MANUFACTURINGCOMPANY, OF OXNARD, CALIFORNIA, A CORPORATION OF CALIFORNIA.

WELL ELEVATOR.

Original application flled April 13, 1922, Serial No. 552,264. Dividedand this application filed May 2.

' 1923. Serial No. 636.101.

T 0 all whom it may concern:

Be it known that I, JOHN GRANT, a citizen of the United States, residingat Los Angeles, in the county of Los Angeles and 5 State of California,have invented new and useful Improvements in Well Elevators. of whichthe following is a specification.

This invention relates to well elevators, and was originally disclosedin application filed by me April 13, 1922, Serial No. 552,264

for well elevators, the present subjectmatter being divided from suchoriginal application.

The invention has for its objects the provision of improvements in wellelevators particularly relating to a supporting member orsuspensionlmeans and means for automatically normally retaining thesupporting member or suspension means in a given relation to theremainder of the elevator or a projection therefrom, whereby thesupportmg member or suspension means may be automatically released tofree the same from the elevator, or may be released voluntarily ormanually, as preferred, when the elevator has been lowered with thetubing or casing or other load, so as to contact with an object toengage with a; pawl or other means, or so that the pawl or likeimeansmay be manually or otherwise voluntarily operated. Other objects willappear.

The invention consists in the novel and useful provision, formation,combination, association and relative arrangement of parts, members andfeatures, all as hereinafter described, shown in the drawing and finallypointed, out in claims.

In the drawing:

Figure 1 is a perspective illustration of an elevator constructed andequipped in accordance with the invention; and,

Figure 2 is a front elevation of a slightly modified form of means forautomatically retaining the supporting member or suspension means inconnection with the remainder of the elevator, which latter is shown invertical section in part, the suspension meansbeing fragmentallyillustrated in operative position in this view, as well as in Figure 1.

Corresponding, parts in both figures are designated by the samereference characters.

Referring with particularity to the drawing, the elevator is shown ascomprising a body A provided with a gate or door B and the body ispreferably provided with open hook-like members 26 to engage with links27 and with a relatlvely large base plate or member'28. The large basemember 28 is provided for the purpose of eliminating the use of catchingor supporting tongs, or forks or slips, otherwise necessary with thistype of device.

Well casings are often of relatively large inner diameter. The workingtools, or drillpipes, or other similar articles, operated within thecasing, however. are normally of different standard sizes of casings,and of relatively small outside measurement. The main portions of anelevator of this type are therefore eventually so small that the wholeelevator might fall into the casing. The forks, tongs, and slips, abovereferred to, are therefore normally used to catch the elevator above theupper end of the large casing.

Providing the small elevator with the large base member is thereforevery convenient and time-saving, without adding too much weight to sucha device.

Pawls 29 are provided, pivotally engaged at 30 to the elevator. one ateach side, having weight members 31 projecting beyond the pivots 30 soas to automatically obstruct'the open hook-like ends 26 of the elevatorfor holding the links 27 engaged with the elevator, and preventing anaccidental disengaging. Whenever the elevator is lowered to the floor,the pawlsxautomatically move, and the links can then be removed.

A slightly modified form of this pawl structure is illustrated in Fig.2.. The pawl 32 is also 'pivotally engaged with the base plate 33 inthis form, at 33*. The weight portion 34 of the pawl in this form,however, is shaped to form a suitable continuation of the base, so thatthe base can be extended by means of the pawl. The pawl portion 32 inthis form swings into the recess 35 in the body 4 when the device is inresting position, as indicated in dotted lines.

Having thus disclosed my invention, *1 claim and. desire to secure byLetters Patent:

1. In an elevator having a body provided with open hook-like portionsfor engaging supporting links, a pawl pivotally engaged to the body neareach of the hook-like portions ofthe body and having weighted portionsforming balancing means for the pawls disposed so as to form anobstruction to the open hook-like portions of the body when the body isin lifted position and adapted to move to open position when the body islowered to a resting position.

2. In an elevator, a'body having open hook-like portions for engagingsupporting links, and pawls pivotally engaged to the body havingportions extending beyond the base forming balancing means for the pawlsso as to automaticallv keep the open hook-' like portions of the bodyobstructed when the body is in lifted position and adapted to move toopen position when the body is lowered to resting position therebyforming an extension to the base of the body. 7

3. In an elevator, a body having a projection for engaging a supportingmember, and a pawl pivotally associated with the body and having aportion extending beyond the base of the body and forming a balancingmeans for the pawl to automatically and normally retain the supportingmember in .a given relation to the projection.

4. In an elevator, a body having a projection for engaging a supportingmember, and a pawl pivotally associated with the body and having aportion extending boyond the base of the body and forming a balancingmeans for the pawl to automatically and normally retain the supportingmember in a given relation to the projection; said extending portionforming an extension to the base of the body when engaged from beneath.

In testimony whereof, I have signed my name to this specification in thepresence of two subscribing witnesses.

- JOHN GRANT.

Witnesses:

J. SHUTT, EDNA TURNER.

